halbert



@uitrit faire atnt @fitta A. W. 'HALllER-T. Ol11 TAYLOR, NEW YORK,ASSIGNOR TO. HIMSELF AND J.

F. STARK-OF THE SAME PLACE.

Letters Patent No. 76,076, datedlfarch 31, 1868.

IMPROVEMENT IN SEWING-MACHINES.

TO ALL WHOM IT MAY CONCERN:

Bc it known that I, A. W. HALBERT, of Taylor, in the county of Cortland,and State of .New York, have invented a new and useful Improvement inSewing-Machines; and I do hereby declare that the following is a full,clear, andzexact description thereof, which will enable those skilled inthe art to make and use the same, reference being had to thcaccompanying drawings, forming part of this speoilication, in which-Figure l is a side view of the working parts of a. sewing-machine of myinvention, partly in section.

Figure 2 is a bottom view of the same under the bed.

Figure 3 is a vertical sectional view, taken in the line x x, figs. land 2.

Figure 4 isa detached view of the driving-wheel, showing the eccentricgroove therein for giving motion to the needle-bar. l

Similar letters -of reference indicate corresponding parts;

This invention relates to improvements in the construction ofsewing-machines, and consists in the construction and arrangementof'mechanism whereby theworking parts are innen simplitied, and movementis given to them all by one wheel directly connected with theneedle-bar, the shuttle, and the `eed-plate, as hereinafter moreparticularly described.

A represents the bed-plate, on which is' fastened the curved arm B, forsupporting the head of the machine, and the curved lever a, having itsfulcrum at y, and givingy motion to the needle-bar ZJ. At the rear end,on the under side of the bed-plate A` is placed a horizontaldriving-wheel or disk, C, which is hungon aspindle, e, that runs upthrough the bed-plate, back of the arm B, by which it is held at theupper end, where it carries a'hand-wheel, D. A wrist, d, on the underside ofthe wheel C, connects it with a bar, e, that carries the shuttleon its outer end, enclosed in a guide-box or racc, g, which is pivotedunder a strap or stirrup, t, tov eseillate freely by means of thecrank-action of the wheel C on the shuttle-carrier bar e, that slidesback and forthv regularly in the guide-box f, while it oscillator.. Thewheel C is to be moved by a friction-wheel bearing on the periphery,packed Witha rubber ring, or in any other suitable way. The pivot c, onwhich the shuttleguide box g oscillates, is made tubular. It is placedon. one side of the box, and the tube opens into it and runs through thebed-plate A, as shown clearly in iig. 3, for the purpose of allowing theneedle to enter and connect with theshutt-le within the guide-box Theshuttle-guide box g is covered by a slide, t', on the bedplate A,whiehslide is moved out'to introduce the shuttle. The shuttlecarrier bar ahas a feed-lever, m, attached to it by a pin-joint at e, which lev'er mrests in and is held iii-place by a slide-gauge, n, that governs thedegree of movement of the sliding feed-plate 0, while themovementof the:feed-plate itself is eieetcd hy the oscillation of the shuttle-carrierbar e when it'works back and forth. The feed-lever m vibratee on a ful.ex'um at its point of rest upon the slide-gauge n. Thevshort arm of thelever is wedge-shaped, and raises thc feed-plate o when it pushes itforward to bca-r against the cloth, and' lets it down clear of the clothwhen it draws the feedplate back.' The slide-gauge n can be moved andset at different points to give more or less movement to the short armof the lever m for increasing or-decreasing the feed. -The needle-bar I)takes its motion from the wheel C by means of an eccentric-groove, 2 1,iig, il, on the inner side of the wheel, wherein the lower end of thecurved lever a works, and is carried forward and back in a straight slotin the bed-plate A, running alongside of the foot of thecurrcd arm B, asshown in fig. 1. In the front of the needle-bar is a device for takingnp the slack of the needle-thread. The thread 'passes through two loopsor eyelets, 7 r, in its passage down in front of the needle-bar, andalso through a loop, w, between the loops 1 r, formed on the end of ashort slotted lever, g, which swings on a pivot inside the face-plate,and is vibratetl by a pin on the needle-bar, working in the slot as itmoves up and down, to take up the slack thread under the needle asitstarts downward. The presser-foot bar x provided with a spiral spring,and regulated by a small hand-lever, z, in the usual way.

It will be observed that the movements are all made directly by thewheel C, in concert with each other, in sueh manner that the workingparts can never change their trelative positions to each other. Theworking parts are few i'n number, and simple and strong in theirconstruction, and operate together in perfect harmony.

Having described my invention, I ciu-im :is new, :md desire to securebyLetters Patent- 1. The driving-wheel C, the shuttle-carrier c, connectedtherewith by the wrist 0l, andthe osciiiabingshuttieguide box g, pivotedby the tubular pivot 7c, constructed, arranged, and opera/singsnbstantiaily as and for the purpose herein described.

2. The comb-inetion of tile Wheel C, the shuttle-carriere, thefeed-lever m, the slide-gauge n, and the fcefiplate o, all arranged andoperating substantially :is and for the purpose herein described.

A. W; HALBERT.-

lViiitnesses: A

EDMUND POTTER, GHANCY D. POTTER.

